Math Question
![Donna bought a candy bar for \( \$ 1.50 \). She paid with nickels and dimes. She used 21 coins in all. How many nickels ( \( n \) ) and how many did she use?
\[
\begin{array}{c}
n+d=21 \\
.05 n+.10 d=1.50
\end{array}
\]
[?] nickels [ ] dimes](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/3/17/bf5a081d-e1a1-4ef0-9960-d0182059f366.png "Donna bought a candy bar for \( \$ 1.50 \). She paid with nickels and dimes. She used 21 coins in all. How many nickels ( \( n \) ) and how many did she use?
\[
\begin{array}{c}
n+d=21 \\
.05 n+.10 d=1.50
\end{array}
\]
[?] nickels [ ] dimes")
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